# Spec Generator

> Specification generator - 7 phase document chain producing product brief, PRD, architecture, epics, and issues. Agent-delegated heavy phases (2-5, 6.5) with Codex review gates. Triggers on "generate spec", "create specification", "spec generator", "workflow:spec".

- Skill: `majiayu000/spec-generator-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/spec-generator-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/spec-generator-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Product & Planning
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/spec-generator-3

---


# Spec Generator

Structured specification document generator producing a complete specification package (Product Brief, PRD, Architecture, Epics, Issues) through 7 sequential phases with multi-CLI analysis, Codex review gates, and interactive refinement. Heavy document phases are delegated to `doc-generator` agents to minimize main context usage. **Document generation only** - execution handoff via issue export to team-planex or existing workflows.

## Architecture Overview

```
Phase 0:   Specification Study (Read specs/ + templates/ - mandatory prerequisite)      [Inline]
           |
Phase 1:   Discovery               -> spec-config.json + discovery-context.json         [Inline]
           |                           (includes spec_type selection)
Phase 1.5: Req Expansion           -> refined-requirements.json                         [Inline]
           |                           (interactive discussion + CLI gap analysis)
Phase 2:   Product Brief            -> product-brief.md + glossary.json                 [Agent]
           |                           (3-CLI parallel + synthesis)
Phase 3:   Requirements (PRD)      -> requirements/  (_index.md + REQ-*.md + NFR-*.md)  [Agent]
           |                           (Gemini + Codex review)
Phase 4:   Architecture            -> architecture/  (_index.md + ADR-*.md)             [Agent]
           |                           (Gemini + Codex review)
Phase 5:   Epics & Stories         -> epics/  (_index.md + EPIC-*.md)                   [Agent]
           |                           (Gemini + Codex review)
Phase 6:   Readiness Check         -> readiness-report.md + spec-summary.md             [Inline]
           |                           (Gemini + Codex dual validation + per-req verification)
           ├── Pass (>=80%): Handoff or Phase 7
           ├── Review (60-79%): Handoff with caveats or Phase 7
           └── Fail (<60%): Phase 6.5 Auto-Fix (max 2 iterations)
                 |
Phase 6.5: Auto-Fix               -> Updated Phase 2-5 documents                       [Agent]
                 |
                 └── Re-run Phase 6 validation
                       |
Phase 7:   Issue Export            -> issue-export-report.md                            [Inline]
                                      (Epic→Issue mapping, ccw issue create, wave assignment)
```

## Key Design Principles

1. **Document Chain**: Each phase builds on previous outputs, creating a traceable specification chain from idea to executable issues
2. **Agent-Delegated**: Heavy document phases (2-5, 6.5) run in `doc-generator` agents, keeping main context lean (summaries only)
3. **Multi-Perspective Analysis**: CLI tools (Gemini/Codex/Claude) provide product, technical, and user perspectives in parallel
4. **Codex Review Gates**: Phases 3, 5, 6 include Codex CLI review for quality validation before output
5. **Interactive by Default**: Each phase offers user confirmation points; `-y` flag enables full auto mode
6. **Resumable Sessions**: `spec-config.json` tracks completed phases; `-c` flag resumes from last checkpoint
7. **Template-Driven**: All documents generated from standardized templates with YAML frontmatter
8. **Pure Documentation**: No code generation or execution - clean handoff via issue export to execution workflows
9. **Spec Type Specialization**: Templates adapt to spec type (service/api/library/platform) via profiles for domain-specific depth
10. **Iterative Quality**: Phase 6.5 auto-fix loop repairs issues found in readiness check (max 2 iterations)
11. **Terminology Consistency**: glossary.json generated in Phase 2, injected into all subsequent phases

---

## Mandatory Prerequisites

> **Do NOT skip**: Before performing any operations, you **must** completely read the following documents. Proceeding without reading the specifications will result in outputs that do not meet quality standards.

### Specification Documents (Required Reading)

| Document | Purpose | Priority |
|----------|---------|----------|
| [specs/document-standards.md](specs/document-standards.md) | Document format, frontmatter, naming conventions | **P0 - Must read before execution** |
| [specs/quality-gates.md](specs/quality-gates.md) | Per-phase quality gate criteria and scoring | **P0 - Must read before execution** |

### Template Files (Must read before generation)

| Document | Purpose |
|----------|---------|
| [templates/product-brief.md](templates/product-brief.md) | Product brief document template |
| [templates/requirements-prd.md](templates/requirements-prd.md) | PRD document template |
| [templates/architecture-doc.md](templates/architecture-doc.md) | Architecture document template |
| [templates/epics-template.md](templates/epics-template.md) | Epic/Story document template |

---

## Execution Flow

```
Input Parsing:
   |- Parse $ARGUMENTS: extract idea/topic, flags (-y, -c, -m)
   |- Detect mode: new | continue
   |- If continue: read spec-config.json, resume from first incomplete phase
   |- If new: proceed to Phase 1

Phase 1: Discovery & Seed Analysis
   |- Ref: phases/01-discovery.md
   |- Generate session ID: SPEC-{slug}-{YYYY-MM-DD}
   |- Parse input (text or file reference)
   |- Gemini CLI seed analysis (problem, users, domain, dimensions)
   |- Codebase exploration (conditional, if project detected)
   |- Spec type selection: service|api|library|platform (interactive, -y defaults to service)
   |- User confirmation (interactive, -y skips)
   |- Output: spec-config.json, discovery-context.json (optional)

Phase 1.5: Requirement Expansion & Clarification
   |- Ref: phases/01-5-requirement-clarification.md
   |- CLI gap analysis: completeness scoring, missing dimensions detection
   |- Multi-round interactive discussion (max 5 rounds)
   |  |- Round 1: present gap analysis + expansion suggestions
   |  |- Round N: follow-up refinement based on user responses
   |- User final confirmation of requirements
   |- Auto mode (-y): CLI auto-expansion without interaction
   |- Output: refined-requirements.json

Phase 2: Product Brief  [AGENT: doc-generator]
   |- Delegate to Task(subagent_type="doc-generator")
   |- Agent reads: phases/02-product-brief.md
   |- Agent executes: 3 parallel CLI analyses + synthesis + glossary generation
   |- Agent writes: product-brief.md, glossary.json
   |- Agent returns: JSON summary {files_created, quality_notes, key_decisions}
   |- Orchestrator validates: files exist, spec-config.json updated

Phase 3: Requirements / PRD  [AGENT: doc-generator]
   |- Delegate to Task(subagent_type="doc-generator")
   |- Agent reads: phases/03-requirements.md
   |- Agent executes: Gemini expansion + Codex review (Step 2.5) + priority sorting
   |- Agent writes: requirements/ directory (_index.md + REQ-*.md + NFR-*.md)
   |- Agent returns: JSON summary {files_created, codex_review_integrated, key_decisions}
   |- Orchestrator validates: directory exists, file count matches

Phase 4: Architecture  [AGENT: doc-generator]
   |- Delegate to Task(subagent_type="doc-generator")
   |- Agent reads: phases/04-architecture.md
   |- Agent executes: Gemini analysis + Codex review + codebase mapping
   |- Agent writes: architecture/ directory (_index.md + ADR-*.md)
   |- Agent returns: JSON summary {files_created, codex_review_rating, key_decisions}
   |- Orchestrator validates: directory exists, ADR files present

Phase 5: Epics & Stories  [AGENT: doc-generator]
   |- Delegate to Task(subagent_type="doc-generator")
   |- Agent reads: phases/05-epics-stories.md
   |- Agent executes: Gemini decomposition + Codex review (Step 2.5) + validation
   |- Agent writes: epics/ directory (_index.md + EPIC-*.md)
   |- Agent returns: JSON summary {files_created, codex_review_integrated, mvp_epic_count}
   |- Orchestrator validates: directory exists, MVP epics present

Phase 6: Readiness Check  [INLINE + ENHANCED]
   |- Ref: phases/06-readiness-check.md
   |- Gemini CLI: cross-document validation (completeness, consistency, traceability)
   |- Codex CLI: technical depth review (ADR quality, data model, security, observability)
   |- Per-requirement verification: iterate all REQ-*.md / NFR-*.md
   |  |- Check: AC exists + testable, Brief trace, Story coverage, Arch coverage
   |  |- Generate: Per-Requirement Verification table
   |- Merge dual CLI scores into quality report
   |- Output: readiness-report.md, spec-summary.md
   |- Handoff options: Phase 7 (issue export), lite-plan, req-plan, plan, iterate

Phase 6.5: Auto-Fix (conditional)  [AGENT: doc-generator]
   |- Delegate to Task(subagent_type="doc-generator")
   |- Agent reads: phases/06-5-auto-fix.md + readiness-report.md
   |- Agent executes: fix affected Phase 2-5 documents
   |- Agent returns: JSON summary {files_modified, issues_fixed, phases_touched}
   |- Re-run Phase 6 validation
   |- Max 2 iterations, then force handoff

Phase 7: Issue Export  [INLINE]
   |- Ref: phases/07-issue-export.md
   |- Read EPIC-*.md files, assign waves (MVP→wave-1, others→wave-2)
   |- Create issues via ccw issue create (one per Epic)
   |- Map Epic dependencies to issue dependencies
   |- Generate issue-export-report.md
   |- Update spec-config.json with issue_ids
   |- Handoff: team-planex, wave-1 only, view issues, done

Complete: Full specification package with issues ready for execution

Phase 6/7 → Handoff Bridge (conditional, based on user selection):
   ├─ team-planex: Execute issues via coordinated team workflow
   ├─ lite-plan: Extract first MVP Epic description → direct text input
   ├─ plan / req-plan: Create WFS session + .brainstorming/ bridge files
   │   ├─ guidance-specification.md (synthesized from spec outputs)
   │   ├─ feature-specs/feature-index.json (Epic → Feature mapping)
   │   └─ feature-specs/F-{num}-{slug}.md (one per Epic)
   └─ context-search-agent auto-discovers .brainstorming/
       → context-package.json.brainstorm_artifacts populated
       → action-planning-agent consumes: guidance_spec (P1) → feature_index (P2)
```

## Directory Setup

```javascript
// Session ID generation
const slug = topic.toLowerCase().replace(/[^a-z0-9\u4e00-\u9fff]+/g, '-').slice(0, 40);
const date = new Date().toISOString().slice(0, 10);
const sessionId = `SPEC-${slug}-${date}`;
const workDir = `.workflow/.spec/${sessionId}`;

Bash(`mkdir -p "${workDir}"`);
```

## Output Structure

```
.workflow/.spec/SPEC-{slug}-{YYYY-MM-DD}/
├── spec-config.json              # Session configuration + phase state
├── discovery-context.json        # Codebase exploration results (optional)
├── refined-requirements.json     # Phase 1.5: Confirmed requirements after discussion
├── glossary.json                 # Phase 2: Terminology glossary for cross-doc consistency
├── product-brief.md              # Phase 2: Product brief
├── requirements/                 # Phase 3: Detailed PRD (directory)
│   ├── _index.md                 #   Summary, MoSCoW table, traceability, links
│   ├── REQ-NNN-{slug}.md         #   Individual functional requirement
│   └── NFR-{type}-NNN-{slug}.md  #   Individual non-functional requirement
├── architecture/                 # Phase 4: Architecture decisions (directory)
│   ├── _index.md                 #   Overview, components, tech stack, links
│   └── ADR-NNN-{slug}.md         #   Individual Architecture Decision Record
├── epics/                        # Phase 5: Epic/Story breakdown (directory)
│   ├── _index.md                 #   Epic table, dependency map, MVP scope
│   └── EPIC-NNN-{slug}.md        #   Individual Epic with Stories
├── readiness-report.md           # Phase 6: Quality report (+ per-req verification table)
├── spec-summary.md               # Phase 6: One-page executive summary
└── issue-export-report.md        # Phase 7: Issue mapping table + spec links
```

## State Management

**spec-config.json** serves as core state file:
```json
{
  "session_id": "SPEC-xxx-2026-02-11",
  "seed_input": "User input text",
  "input_type": "text",
  "timestamp": "ISO8601",
  "mode": "interactive",
  "complexity": "moderate",
  "depth": "standard",
  "focus_areas": [],
  "spec_type": "service",
  "iteration_count": 0,
  "iteration_history": [],
  "seed_analysis": {
    "problem_statement": "...",
    "target_users": [],
    "domain": "...",
    "constraints": [],
    "dimensions": []
  },
  "has_codebase": false,
  "refined_requirements_file": "refined-requirements.json",
  "issue_ids": [],
  "issues_created": 0,
  "phasesCompleted": [
    { "phase": 1, "name": "discovery", "output_file": "spec-config.json", "completed_at": "ISO8601" },
    { "phase": 1.5, "name": "requirement-clarification", "output_file": "refined-requirements.json", "discussion_rounds": 2, "completed_at": "ISO8601" },
    { "phase": 3, "name": "requirements", "output_dir": "requirements/", "output_index": "requirements/_index.md", "file_count": 8, "completed_at": "ISO8601" }
  ]
}
```

**Resume mechanism**: `-c|--continue` flag reads `spec-config.json.phasesCompleted`, resumes from first incomplete phase.

## Core Rules

1. **Start Immediately**: First action is TaskCreate initialization, then Phase 0 (spec study), then Phase 1
2. **Progressive Phase Loading**: Read phase docs ONLY when that phase is about to execute
3. **Auto-Continue**: All phases run autonomously; check TaskList to execute next pending phase
4. **Parse Every Output**: Extract required data from each phase for next phase context
5. **DO NOT STOP**: Continuous 7-phase pipeline until all phases complete or user exits
6. **Respect -y Flag**: When auto mode, skip all AskUserQuestion calls, use recommended defaults
7. **Respect -c Flag**: When continue mode, load spec-config.json and resume from checkpoint
8. **Inject Glossary**: From Phase 3 onward, inject glossary.json terms into every CLI prompt
9. **Load Profile**: Read templates/profiles/{spec_type}-profile.md and inject requirements into Phase 2-5 prompts
10. **Iterate on Failure**: When Phase 6 score < 60%, auto-trigger Phase 6.5 (max 2 iterations)
11. **Agent Delegation**: Phase 2-5 and 6.5 MUST be delegated to `doc-generator` agents via Task tool — never execute inline
12. **Lean Context**: Orchestrator only sees agent return summaries (JSON), never the full document content
13. **Validate Agent Output**: After each agent returns, verify files exist on disk and spec-config.json was updated

## Agent Delegation Protocol

For Phase 2-5 and 6.5, the orchestrator delegates to a `doc-generator` agent via the Task tool. The orchestrator builds a lean context envelope — passing only paths, never file content.

### Context Envelope Template

```javascript
Task({
  subagent_type: "doc-generator",
  run_in_background: false,
  description: `Spec Phase ${N}: ${phaseName}`,
  prompt: `
## Spec Generator - Phase ${N}: ${phaseName}

### Session
- ID: ${sessionId}
- Work Dir: ${workDir}
- Auto Mode: ${autoMode}
- Spec Type: ${specType}

### Input (read from disk)
${inputFilesList}  // Only file paths — agent reads content itself

### Instructions
Read: ${skillDir}/phases/${phaseFile}  // Agent reads the phase doc for full instructions
Apply template: ${skillDir}/templates/${templateFile}

### Glossary (Phase 3+ only)
Read: ${workDir}/glossary.json

### Output
Write files to: ${workDir}/${outputPath}
Update: ${workDir}/spec-config.json (phasesCompleted)
Return: JSON summary { files_created, quality_notes, key_decisions }
`
});
```

### Orchestrator Post-Agent Validation

After each agent returns:

```javascript
// 1. Parse agent return summary
const summary = JSON.parse(agentResult);

// 2. Validate files exist
summary.files_created.forEach(file => {
  const exists = Glob(`${workDir}/${file}`);
  if (!exists.length) throw new Error(`Agent claimed to create ${file} but file not found`);
});

// 3. Verify spec-config.json updated
const config = JSON.parse(Read(`${workDir}/spec-config.json`));
const phaseComplete = config.phasesCompleted.some(p => p.phase === N);
if (!phaseComplete) throw new Error(`Agent did not update phasesCompleted for Phase ${N}`);

// 4. Store summary for downstream context (do NOT read full documents)
phasesSummaries[N] = summary;
```

---

## Reference Documents by Phase

### Phase 1: Discovery
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/01-discovery.md](phases/01-discovery.md) | Seed analysis and session setup | Phase start |
| [templates/profiles/](templates/profiles/) | Spec type profiles | Spec type selection |
| [specs/document-standards.md](specs/document-standards.md) | Frontmatter format for spec-config.json | Config generation |

### Phase 1.5: Requirement Expansion & Clarification
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/01-5-requirement-clarification.md](phases/01-5-requirement-clarification.md) | Interactive requirement discussion workflow | Phase start |
| [specs/quality-gates.md](specs/quality-gates.md) | Quality criteria for refined requirements | Validation |

### Phase 2: Product Brief
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/02-product-brief.md](phases/02-product-brief.md) | Multi-CLI analysis orchestration | Phase start |
| [templates/product-brief.md](templates/product-brief.md) | Document template | Document generation |
| [specs/glossary-template.json](specs/glossary-template.json) | Glossary schema | Glossary generation |

### Phase 3: Requirements
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/03-requirements.md](phases/03-requirements.md) | PRD generation workflow | Phase start |
| [templates/requirements-prd.md](templates/requirements-prd.md) | Document template | Document generation |

### Phase 4: Architecture
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/04-architecture.md](phases/04-architecture.md) | Architecture decision workflow | Phase start |
| [templates/architecture-doc.md](templates/architecture-doc.md) | Document template | Document generation |

### Phase 5: Epics & Stories
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/05-epics-stories.md](phases/05-epics-stories.md) | Epic/Story decomposition | Phase start |
| [templates/epics-template.md](templates/epics-template.md) | Document template | Document generation |

### Phase 6: Readiness Check
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/06-readiness-check.md](phases/06-readiness-check.md) | Cross-document validation | Phase start |
| [specs/quality-gates.md](specs/quality-gates.md) | Quality scoring criteria | Validation |

### Phase 6.5: Auto-Fix
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/06-5-auto-fix.md](phases/06-5-auto-fix.md) | Auto-fix workflow for readiness issues | When Phase 6 score < 60% |
| [specs/quality-gates.md](specs/quality-gates.md) | Iteration exit criteria | Validation |

### Phase 7: Issue Export
| Document | Purpose | When to Use |
|----------|---------|-------------|
| [phases/07-issue-export.md](phases/07-issue-export.md) | Epic→Issue mapping and export | Phase start |
| [specs/quality-gates.md](specs/quality-gates.md) | Issue export quality criteria | Validation |

### Debugging & Troubleshooting
| Issue | Solution Document |
|-------|-------------------|
| Phase execution failed | Refer to the relevant Phase documentation |
| Output does not meet expectations | [specs/quality-gates.md](specs/quality-gates.md) |
| Document format issues | [specs/document-standards.md](specs/document-standards.md) |

## Error Handling

| Phase | Error | Blocking? | Action |
|-------|-------|-----------|--------|
| Phase 1 | Empty input | Yes | Error and exit |
| Phase 1 | CLI seed analysis fails | No | Use basic parsing fallback |
| Phase 1.5 | Gap analysis CLI fails | No | Skip to user questions with basic prompts |
| Phase 1.5 | User skips discussion | No | Proceed with seed_analysis as-is |
| Phase 1.5 | Max rounds reached (5) | No | Force confirmation with current state |
| Phase 2 | Single CLI perspective fails | No | Continue with available perspectives |
| Phase 2 | All CLI calls fail | No | Generate basic brief from seed analysis |
| Phase 3 | Gemini CLI fails | No | Use codex fallback |
| Phase 4 | Architecture review fails | No | Skip review, proceed with initial analysis |
| Phase 5 | Story generation fails | No | Generate epics without detailed stories |
| Phase 6 | Validation CLI fails | No | Generate partial report with available data |
| Phase 6.5 | Auto-fix CLI fails | No | Log failure, proceed to handoff with Review status |
| Phase 6.5 | Max iterations reached | No | Force handoff, report remaining issues |
| Phase 7 | ccw issue create fails for one Epic | No | Log error, continue with remaining Epics |
| Phase 7 | No EPIC files found | Yes | Error and return to Phase 5 |
| Phase 7 | All issue creations fail | Yes | Error with CLI diagnostic, suggest manual creation |
| Phase 2-5 | Agent fails to return | Yes | Retry once, then fall back to inline execution |
| Phase 2-5 | Agent returns incomplete files | No | Log gaps, attempt inline completion for missing files |

### CLI Fallback Chain

Gemini -> Codex -> Claude -> degraded mode (local analysis only)